alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE W32/Quarian HTTP Proxy Header"; flow:established,to_server; http.header_names; content:"|0d 0a|Content_length|0d 0a|"; fast_pattern; content:"|0d 0a|Proxy-Connetion|0d 0a|"; reference:url,vrt-blog.snort.org/2012/12/quarian.html; classtype:trojan-activity; sid:2015999; rev:3; metadata:created_at 2012_12_08, signature_severity Major, updated_at 2024_02_20;)